The teachers are having a meeting.变被动句时have为什么成了held

The teachers are having a meeting.变被动句时have为什么成了held The teachers are having a meeting The meeting is held by the The teachers are having a meeting.(变为否定句) teachers,where,are,having,meeting,a,the The teachers are having a meeting.(对The teachers 提问) The teachers are having a meeting.同义句转换 The teachers______ _ The teachers are having a meeting.（对划线部分a meeting提问） Where are the teachers?They're having a long meeting and it Please keep______.The teachers are having a meeting.______里填 Our teachers are having a m___in the teachers' office. America/a/the/having/teachers/are/great/time/.(连词成句)帮帮我呗,急…… the manager and the workers are having a meeting同义句 the mana